MCP16301
300 mA D2PAK
Demo Board
User’s Guide
© 2011 Microchip Technology Inc.
DS51983A
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
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Trademarks
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Solutions Company are registered trademarks of Microchip
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Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified
logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,
TSHARC, UniWinDriver, WiperLock and ZENA are
trademarks of Microchip Technology Incorporated in the
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SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
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© 2011, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-61341-179-7
Microchip received ISO/TS-16949:2002 certification for its worldwide
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and India. The Company’s quality system processes and procedures
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devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS51983A-page 2
© 2011 Microchip Technology Inc.
MCP16301 300 mA D2PAK
DEMO BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 5
Introduction............................................................................................................ 5
Document Layout .................................................................................................. 5
Conventions Used in this Guide ............................................................................ 6
Recommended Reading........................................................................................ 7
The Microchip Web Site ........................................................................................ 7
Customer Support ................................................................................................. 7
Document Revision History ................................................................................... 7
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 9
1.2 MCP16301 Short Overview ............................................................................ 9
1.3 What is the MCP16301 300 mA D2PAK Demo Board? ............................... 10
1.4 What Does the MCP16301 300 mA D2PAK Demo Board Kit Contain? ....... 10
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 11
2.2 Getting Started ............................................................................................. 12
Appendix A. Schematics and Layouts
A.1 Introduction .................................................................................................. 13
A.2 Board – Schematic ....................................................................................... 14
A.3 Board – Top Silk and Pads .......................................................................... 15
A.4 Board – Top Copper Layer .......................................................................... 15
A.5 Board – Bottom Copper Layer ..................................................................... 16
Appendix B. Bill of Materials (BOM)
Worldwide Sales and Service .................................................................................... 18
© 2011 Microchip Technology Inc.
DS51983A-page 3
MCP16301 300 mA D2PAK Demo Board User’s Guide
DS51983A-page 4
© 2011 Microchip Technology Inc.
MCP16301 300 mA D2PAK
DEMO BOARD USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the
document.
For the most up-to-date information on development tools, see the MPLAB® IDE on-line help.
Select the Help menu, and then Topics to open a list of available on-line help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP16301 300 mA D2PAK Demo Board. Items discussed in this chapter include:
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Recommended Reading
The Microchip Web Site
Customer Support
Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MCP16301 300 mA D2PAK Demo Board as
a development tool to emulate and debug firmware on a target board. The manual
layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MCP16301
300 mA D2PAK Demo Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with MCP16301 300 mA D2PAK Demo Board and a description of the
user’s guide.
• Appendix A. “Schematics and Layouts” – Shows the schematic and layout
diagrams for the MCP16301 300 mA D2PAK Demo Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MCP16301 300 mA D2PAK Demo Board.
© 2011 Microchip Technology Inc.
DS51983A-page 5
MCP16301 300 mA D2PAK Demo Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
Represents code supplied by
user
DS51983A-page 6
Examples
File>Save
Press <Enter>, <F1>
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
var_name [,
var_name...]
void main (void)
{ ...
}
© 2011 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use the MCP16301 300 mA D2PAK Demo Board.
Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources.
• MCP16301 Data Sheet – “High Voltage Input Integrated Switch Step-Down
Regulator” (DS25004)
• AN1385 Application Note – “Dynamic Analysis of the MCP16301 Switchmode Power Converter Utilizing the MCP16301 Design Analyzer” (DS01385)
• MCP16301 User’s Guide – “MCP16301 600 mA Demo Board User’s Guide”
(DS51978)
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web
site is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the web site contains the following
information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the web site at:
http://www.microchip.com/support.
DOCUMENT REVISION HISTORY
Revision A (May 2011)
• Initial Release of this Document.
© 2011 Microchip Technology Inc.
DS51983A-page 7
MCP16301 300 mA D2PAK Demo Board User’s Guide
NOTES:
DS51983A-page 8
© 2011 Microchip Technology Inc.
MCP16301 300 mA D2PAK
DEMO BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MCP16301 300 mA D2PAK Demo Board, and
covers the following topics:
• MCP16301 Short Overview
• What is the MCP16301 300 mA D2PAK Demo Board?
• What Does the MCP16301 300 mA D2PAK Demo Board Kit Contain?
1.2
MCP16301 SHORT OVERVIEW
The MCP16301 device is a highly integrated, high-efficiency, fixed frequency,
step-down DC-DC converter in a popular 6-pin SOT-23 package, that operates from
input voltage sources up to 30V. The integrated features include a high-side switch,
fixed frequency peak current mode control, internal compensation, peak current limit
and overtemperature protection. Minimal external components are needed to develop
a high-efficiency power supply, operating from a high-voltage input.
High-converter efficiency is achieved by integrating the current limited, low resistance,
high-speed N-Channel MOSFET and associated drive circuitry. High-switching
frequency minimizes the size of the external filtering components, resulting in a small
solution size.
The MCP16301 300 mA D2PAK Demo Board can supply 300 mA of continuous current, while regulating the output voltage from 2.0V to 15V. An integrated, high-performance peak current mode architecture keeps the output voltage tightly regulated, even
during input voltage steps and output current transient conditions that are common in
power systems. For this evaluation board, the external components are sized such that
they can fit into a smaller space than a D2PAK linear regulator. The external components, namely the Schottky diode and the inductor, limit the maximum output current
for this application to less than 300 mA.
1N4448
VIN
4.0V to 26V
CBOOST L1
100 nF 15 µH
BOOST
SW
VIN
CIN
2.2 µF
VOUT
3.3V @ 150 mA
30V
Schottky
Diode
EN
COUT
22 µF
31.2 KΩ
VFB
GND
FIGURE 1-1:
© 2011 Microchip Technology Inc.
10 KΩ
300 mA Typical, MCP16301 Step-Down Application.
DS51983A-page 9
MCP16301 300 mA D2PAK Demo Board User’s Guide
1.3
WHAT IS THE MCP16301 300 MA D2PAK DEMO BOARD?
The MCP16301 300 mA D2PAK Demo Board is designed to operate from a 4V to 26V
input and regulate the output to 3.3V while delivering 300 mA of load current. Test
points for input power and load are provided to demonstrate the capability of the demo
board over the entire range. The board was designed using small surface mount
components, to show the small board area necessary for a high-input voltage, 300 mA
design, that fits into less board area than the popular D2PAK, commonly used for linear
regulators.
1.4
WHAT DOES THE MCP16301 300 MA D2PAK DEMO BOARD KIT CONTAIN?
The MCP16301 300 mA D2PAK Demo Board kit includes:
• MCP16301 300 mA D2PAK Demo Board (102-00360)
• Important Information Sheet.
DS51983A-page 10
© 2011 Microchip Technology Inc.
MCP16301 300 mA D2PAK
DEMO BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
2.1.1
MCP16301 Features
The MCP16301 device has been developed to provide high input voltage applications
with a precise low voltage regulated rail, while operating at high efficiency.
The key features of the MCP16301 include:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Up to 96% Typical Efficiency
Input Voltage Range: 4.0V to 30V
Output Voltage Range: 2.0V to 15V
2% Output Voltage Accuracy
Integrated N-Channel Buck Switch: 460 mΩ
600 mA Output Current
500 kHz Fixed Frequency
Adjustable Output Voltage
Low Device Shutdown Current
Peak Current Mode Control
Internal Compensation
Stable with Ceramic Capacitors
Internal Soft-Start
Cycle-by-Cycle Peak Current Limit
Under Voltage Lockout (UVLO): 3.5V
Overtemperature Protection
Available Package: SOT-23 -6
A high performance peak current mode control system is used to deliver fast response
to sudden line and load changes.
2.1.2
MCP16301 300 mA D2PAK Demo Board Features
The MCP16301 300 mA D2PAK Demo Board is developed to demonstrate how the
MCP16301 operates over a wide input voltage and load range. Test points are provided
for input and output, allowing the demo board to be connected directly to a system.
© 2011 Microchip Technology Inc.
DS51983A-page 11
MCP16301 300 mA D2PAK Demo Board User’s Guide
2.2
GETTING STARTED
The MCP16301 300 mA D2PAK Demo Board is fully assembled and tested to evaluate
and demonstrate the MCP16301 capability.
2.2.1
Power Input and Output Connection
2.2.1.1
POWERING THE MCP16301 300 MA D2PAK DEMO BOARD
The MCP16301 300 mA D2PAK Demo Board is fully assembled, tested and ready for
evaluation. Apply positive input voltage to the VIN terminal and the corresponding
return to the GND terminal. The maximum input voltage should not exceed 26V. An
electronic load or resistive load can be used for evaluation or the intended system load
can be connected. The electronic loads attempt to sink current at 0V during startup. A
resistive load or constant resistance is recommended for startup evaluation. Connect
the positive voltage terminal of the load to the VOUT terminal on the demo board, and
connect the negative or return side of the load to the GND terminal.
2.2.1.2
BOARD TESTING
To test the board, follow the next steps:
1. Apply the input voltage.
2. An internal pull up resistor is connected from VIN to the EN input of the
MCP16301. Once the input voltage is greater than 3.5V, the device begins to
switch. Apply greater than 4V supply to the input for proper operation. A minimum
load is required to regulate the output to 3.3V. For minimum load requirements
(light load conditions), detailed information is provided in the data sheet.
3. The measured output voltage should be 3.3V typical. Adjusting the input voltage
and load should not cause the output to vary more than a few mV over the operating range of the converter.
2.2.2
How the MCP16301 300 mA D2PAK Demo Board Boost Strap
Operates
The MCP16301 integrates a low resistance N-Channel MOSFET. A high side or
floating supply is needed to drive the gate of the N-Channel MOSFET above the input
voltage to turn it on. The demo board uses the output voltage (3.3V) to charge the boost
cap, while inductor current flows, clamping the SW node to a diode drop below ground.
Prior to start up, there is no inductor current, so an internal pre-charge circuit charges
the boost cap up to a minimum threshold. Once charged, the N-Channel can be turned
on, ramping current into the inductor.
The worst case operating conditions for charging the boost capacitor occur at minimum
VIN and no load. At minimum VIN (4V), there is not enough head room to pre-charge
the boost cap to a high value. At no load, the converter is operating at a minimum or
very low duty cycle, putting a small amount of current into the inductor. When the switch
turns off the inductor, current decays very quickly, resulting in a small time to recharge
the boost capacitor.
DS51983A-page 12
© 2011 Microchip Technology Inc.
MCP16301 300 mA D2PAK
DEMO BOARD USER’S GUIDE
Appendix A. Schematics and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the
MCP16301 300 mA D2PAK Demo Board:
•
•
•
•
Board – Schematic
Board – Top Silk and Pads
Board – Top Copper Layer
Board – Bottom Copper Layer
© 2011 Microchip Technology Inc.
DS51983A-page 13
DS51983A-page 14
1
1
GND
VIN
TP2
TP1
C1
2.2 µ
0805
R1 1
100k
0402
2
2
4
5
U1
GND
EN
Vin
FB
SW
BOOST
MCP16301 SOT23
3
6
1
D1
30V 1A
2 SCHOTTKY
1
C3 2
0.1 µF 2
0402 1
LPS3015
L1
15µ
R3
10k
0402
2
1
R2 1
31.6k
0603
2
C2
22µ
0603
TP4
VOUT
1
GND1
1
TP3
A.2
SOD-323
D2
MCP16301 300 mA D2PAK Demo Board User’s Guide
BOARD – SCHEMATIC
© 2011 Microchip Technology Inc.
Schematics and Layouts
A.3
BOARD – TOP SILK AND PADS
A.4
BOARD – TOP COPPER LAYER
© 2011 Microchip Technology Inc.
DS51983A-page 15
MCP16301 300 mA D2PAK Demo Board User’s Guide
A.5
BOARD – BOTTOM COPPER LAYER
DS51983A-page 16
© 2011 Microchip Technology Inc.
MCP16301 300 mA D2PAK
DEMO BOARD USER’S GUIDE
Appendix B. Bill of Materials (BOM)
TABLE B-1:
Qty
BILL OF MATERIALS (BOM)
Reference
Description
Manufacturer
Part Number
1
C1
CAP CER 2.2 µF 50V X5R 0805
TDK®
1
C2
CAP CER 10uF 6.3V X5R 0603
Taiyo Yuden®
JMK107BJ106MA-T
1
C3
CAP CER 0.10uF 6.3V X5R 0402
TDK Corporation
C1005X5R0J104M
1
D1
DIODE SCHOTTKY 30V 1A
PWRDI-323
Diodes® Incorporated
PD3S130HDICT-ND
1
D2
DIODE SWITCH 75V 200mW
SOD-323
Diodes Incorporated
1N4448WS-7-F
1
L1
Sheilded Power Inductor 15 µH
Coilcraft® Inc.
LPS3015-153MLB
1
PCB
RoHS Compliant Bare PCB MCP16301
D2PAK Board
1
R1
RES 1.00M OHM 1/10W 1% 0402 SMD Panasonic®-ECG
ERJ-2RKF1004X
1
R2
RES 31.6K OHM 1/10W 1% 0402 SMD Panasonic-ECG
ERJ-2RKF3162X
1
R3
RES 10.0K OHM 1/10W 1% 0402 SMD Panasonic-ECG
ERJ-2RKF1002X
4
TP1, TP2,
TP3, TP4
PC TEST POINT TIN SMD
Harwin Inc
S1751-46R
1
U1
MCP16301 High Input Buck Converter
SOT-23
Microchip Technology Inc. MCP16301T-I/CHY
Note 1:
Corporation
—
C2012X5R1H225K
104-00360
The components listed in this Bill of Materials are representative of the PCB assembly. The
released BOM used in manufacturing uses all RoHS-compliant components.
© 2011 Microchip Technology Inc.
DS51983A-page 17
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
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Tel: 886-7-213-7830
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Tel: 86-755-8203-2660
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Tel: 886-2-2500-6610
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Tel: 66-2-694-1351
Fax: 66-2-694-1350
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Tel: 39-0331-742611
Fax: 39-0331-466781
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Fax: 31-416-690340
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Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
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Tel: 86-592-2388138
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DS51983A-page 18
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05/02/11
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